London Transport's small-bore tube tunnels represent a hostile environment in which to establish a speech link with moving trains. Deficiencies in the carrier wave system introduced on the Victoria line in 1968 led to experiments with multi-base stations and balanced leaky-feeder cables on the Bakerloo, but coaxial feeders with one-way repeaters are giving better results on the Northern line.


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    Title :

    Voice communication in the tube


    Additional title:

    Sprechverbindung mit fahrenden U-Bahnzuegen


    Contributors:

    Published in:

    Publication date :

    1976


    Size :

    4 Seiten, 4 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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